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9961 (1991 XK)
Classification: Main-belt Asteroid          SPK-ID: 2009961
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1056071833423646 5.8954e-08  
a 2.2410323939994 9.2937e-09 au
q 2.004363275090128 1.3179e-07 au
i 4.856810667378871 4.8136e-06 deg
node 239.9471289497596 6.3739e-05 deg
peri 290.6234217066201 6.7705e-05 deg
M 34.79064305856016 2.1296e-05 deg
tp 2457482.078492943431
(2016-Apr-03.57849294)
7.251e-05 JED
period 1225.379550145317
3.35
7.6226e-06
2.087e-08
d
yr
n .2937865251279147 1.8275e-09 deg/d
Q 2.477701512908673 1.0275e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1295  
   data-arc span      14593 days (39.95 yr)  
   first obs. used      1976-05-02  
   last obs. used      2016-04-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49656  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:06:53  

Additional Information
 Earth MOID = 1.01494 au 
 Jupiter MOID = 2.51151 au 
 T_jup = 3.622 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3 mag n/a MPO319209  

9961 (1991 XK)          Discovered 1991-Dec-04 by Ueda, S., Kaneda, H. at Kushiro
Reference: 19990202/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 XK = 1976 JT = 1989 BP 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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